Answer:
Step-by-step explanation:
First, do what is inside the parentheses (PEMDAS)
29+18= 47
Now do the other parentheses
17-8=9
now add them together cuz they r inside a bigger parentheses
9+47=56
now divide by 8
56/8=7
Answer: 472$
3x+7y-12=0
3x+7y=12
3x=12-7y
x=12-7y/3